/Engine/Source/Runtime/InteractiveToolsFramework/Public/BaseGizmos/GizmoInterfaces.h
FInputRayHitindicating whether or not the target object was hit by the device-ray at ClickPos The ray hit contains client-defined ID, HitOwner and HitObject which are used to identify the hit part.
[FInputRayHit](API\Runtime\InteractiveToolsFramework\FInputRayHit) IsHit ( const [FInputDeviceRay](API\Runtime\InteractiveToolsFramework\FInputDeviceRay) & ClickPos ) const